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Thompson's High Performance Black Roof Sealant 2.5L.This waterproof roof sealant from the Thompson's High performance range has been specially designed for maintaining flat roofs. Apply with a brush roller or broom to provide protection to the roofing felt asphalt slate tiles concrete brick wood. It's effective for 10 years. It only takes 6 hours to dry and will cover 2m² per litre on average. Comes in an easy to store and transport tin.
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